Possibly a nothing, but given that the system has "hung" a few times in the last couple of months, apparently due to full RAM and SWAP...
I've got a system running FreeBSD 11-RELEASE-p5 (64 bit), 16 GB of RAM and ZFS. It runs a handful of services, all of which I used to run on an Ubuntu system with 4 GB of RAM without issue.
The wired memory used on the system keeps growing steadily. I can actually watch it tick upwards. Shortly after I rebooted the system it was showing 1.2 GB wired, Now it's up to 6 GB (6 hours after booting). ZFS's ARC cache is currently at 1 GB (4 GB max) and throttled according to zfs-stats.
The ARC was consuming 4 GB up until roughly 4.5 hours after booting, at which point it started getting reduced until it hit 1 GB some 50 minutes later. The timing of the ARC reducing was closely matched by a slow increase in swap usage (from 0 then to about 4 GB now).
Now, I appreciate this may be nothing at all. It's been "some years" since I last used FreeBSD (probably at least 8) and this kind of behaviour may not be abnormal, but it doesn't feel right.
How can I diagnose this? Where can I go looking to see what's causing the steady growth in Wired memory? What other diagnostic details can I provide, or am I just worrying about nothing?
I've got a system running FreeBSD 11-RELEASE-p5 (64 bit), 16 GB of RAM and ZFS. It runs a handful of services, all of which I used to run on an Ubuntu system with 4 GB of RAM without issue.
The wired memory used on the system keeps growing steadily. I can actually watch it tick upwards. Shortly after I rebooted the system it was showing 1.2 GB wired, Now it's up to 6 GB (6 hours after booting). ZFS's ARC cache is currently at 1 GB (4 GB max) and throttled according to zfs-stats.
The ARC was consuming 4 GB up until roughly 4.5 hours after booting, at which point it started getting reduced until it hit 1 GB some 50 minutes later. The timing of the ARC reducing was closely matched by a slow increase in swap usage (from 0 then to about 4 GB now).
Now, I appreciate this may be nothing at all. It's been "some years" since I last used FreeBSD (probably at least 8) and this kind of behaviour may not be abnormal, but it doesn't feel right.
How can I diagnose this? Where can I go looking to see what's causing the steady growth in Wired memory? What other diagnostic details can I provide, or am I just worrying about nothing?